Petee mccouet



(No'ModeLf P. MQOOUBT,

PLAN'ER KNIFE.

No. 299,153 7 Patented May '27, 1884.

WITNESSES We nrrnn Era'rne Parana Urrrcn.

PETER MOCOURT, OF APPLETON, VVISGONSIN, ASSIGNOR OF ONE-HALF TO JAMES H.SIMPSON, OF SAME PLACE.

ehanemknirs.

SPECIFICATION forming part ,of Letters Patent No. 299,153, dated May 27,1884:. Application filed March 28, 1884. (No model.)

To aZZ whom it may concern/.-

Be' it known that I, PETER MoOoUR'r, a citizen of the United States,residing at Appleton, in the county of Outagamie and State of Wisconsin,have invented a new and useful Planer 7 Knife, of which the following isa specification, reference being had to the accompanying drawings.

This invention has relation to planer-knives; and it consists in theconstruction and novel arrangement of parts, as will be hereinafterfully described, and particularly pointed out in the claim.

Figure 1 is a view in perspective of a set of planer-knives embodying myimprovements, showingone of the weight-receptacles open, the othersbeing closed. Fig. 2 is a vertical sectional view through a filledreceptacle, its cap and screw; and Fig. 8 is a similar view through anempty receptacle, its cap and se curing-screw.

After grinding a set of planer-knivessuch as are used on allwood-working maehines-it will be found that the knives are of unequal.weight, and run, as they are, at a high rate of speed, are out ofbalance and perform imperfect work. Heretofore this defect has beenremedied and the knives made to balance either by the use of the tile,an emery-wheel, or the drill, which is a very slow process at best, andruins the knives before they are half worn out.

The object of my invention is to facilitate the balancing as well as toinsure the accuracy of the balance of planer-knives by the means hereindescribed, and illustrated in the accompanying drawings.

Referring bylctter to the latter, a designates a set of planer-knives,which consists of two or more knives, 6, each of which is provided inits under face with a weight-receptacle, 0, between the slots d, whichlatter open out at the rear edge of the set of knives. Theseweight-receptacles c are about one inch ameter and about five-sixteenthsof an inch deep, the blade being, say, six-sixteenths of an in diaremade to balance. I find the heaviest knife by placing the knives uponthe'scales, (the weight-receptacles having been filled with shot orother heavy metal,) and loosen the screw sufficiently to enable me toturn the cap to one side and remove the filling from the receptacle ofthe heaviest knife until both are of equal weight, then turn the capback to place and tighten up the screw, thus completing the balancing ofthe knives; or, if preferred, the receptacles may be only partiallyfilled, thus enabling the operator to take from the heavier knife andadd to the lighter one, as the weight must be equally distributedthroughout the entire length .of the knife.

This method of balancing can be used on all knives used on wood-workingmachines.

It is simple, cheap, and efficient, and knives thus constructed can bequickly and accurately balanced and their usefulness greatly prolongedover knives that have to be balanced in the old way.

Having thusfully described my invention, what I claim as new, and desireto secure by Letters Patent of the United States, is

A set of planer-knives provided between the slots forming the knifesections with weightreceptacle, having swinging covers, and balancingmaterial. or filling in saidreceptacles, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

PETER MGOOURT. IVitnesses:

J os. KOFFIND, Gno. M. BARBER.

